Title

Hydrogen Isotope Separation within the Metal-Organic Framework Cu(I)-MFU-4l

Abstract

Hydrogen isotope separation within the metal-organic framework material known as Cu(I)-MFU-4l is investigated using a combination of breakthrough analysis, equilibrium measurements, and infrared spectroscopy. Results confirm the expected large infrared frequency shift of the adsorbed H-2 vibrational mode and reveal an extremely high binding energy difference between H-2 and D-2 of 2.3 kJ/mol. Both static and dynamic measurements indicate that the material's selectivity for D-2 over H-2 increases with decreasing temperature, reaching a maximum at approximate to 100 K, but then decreases for lower temperatures. These results indicate an activation barrier for the replacement of adsorbed H-2 by D-2 and place a limit on the material's effectiveness for isotope separation at low temperature.

Publisher

Ameridan Chemical Society

Publication Date

12-19-2019

Publication Title

Journal of Physical Chemistry C

Department

Physics and Astronomy

Document Type

Article

DOI

10.1021/acs.jpcc.9b09332

Keywords

Efficient separation, Breakthrough, Binding, H-2, Activation, Chemstiry, Affinity, Energy, D-2

Language

English

Format

text

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